| 摘要 |
PROBLEM TO BE SOLVED: To provide a semi-conductive silicon roll capable of giving a sufficient electrification capacity relating to a toner by preventing deterioration of an environmental resistance characteristic of silicon rubber as an elastic unit, and having a stable frictional electrification characteristic. SOLUTION: This semi-conductive silicon rubber roll is formed by coating an outer peripheral surface of a conductive shaft unit 1 with a polyurethane resin layer 3 of 0 to 15 (nC) contact electrification capacity, when it is measured by using a cascaded contact electrification measuring device, through a semi- conductive elastic layer 2 consisting of silicon rubber. |
